The Study On The Lower Impact Energy In Red Sandstone Soil Consumption And Transfer

Red sandstone in the country,especially in southern Jiangxi widely distributed,so often used to backfill all types of ground,while the impact load and reinforcement is the most effective kind of soil reinforcement methods,with low cost and excellent reinforcing effect,Construction simplicity and other advantages.But the impact load reinforcement theory greatly influenced by filling physical and mechanical parameters,so research stage and is not fully applicable to the filling of red sandstone foundations.In order to further improve the application of the impact load reinforcement theory in red sandstone in the coarse-grained soils,based on theoretical calculations,laboratory experiments and field trials in three aspects of the impact of lower energy consumption and transfer law in the red sand in rock were study,we obtained the following conclusions:1.coarse red sandstone dynamic compaction of soil reinforcement mechanism was verified,and the propagation characteristics of the shock wave,it is assumed impact load reinforcement is ellipsoidal range,and the calculation formula of the assumed impact soongorica geotechnical reinforcement under load range;for effect of various factors red sandstone backfill ground reinforcement effect,put forward the same click can impact conditions,the choice of high light hammer down construction optimization scheme of distance;2.Based on the experimental results were found: impact load consolidation process,there will be an optimum soil compaction number,when more than this value,click the soil settlement value will rapidly decrease,overall settlement have stabilized;red sand rock and soil moisture content increases with the cumulative impact energy and reduce the regularity,after its conversion by the dry density will be infinitely close to the maximum dry density of compacted soil,soil reinforcement process is soil and pore water dissipation;density of the reinforced soil mass is gradually reduced from top to bottom,that impact can be on the upper layer of soil compaction role,a part of the impact energy will be gradually passed by the action of soil reinforcement after in the lower part of the soil until the dissipate completed;3.Through the foundation strengthening works Gannan a zone of the static load test,the effect of reinforcing the impact load tested and found soil settlement after the impact load reinforcement stable,capacity is improved significantly,reaching more than 220 kP fully meet the design requirements of 190 kPa,illustrated by strengthening the foundation of the impactload is feasible;foundation reinforcement by field test data collection,to give Shen rammed soil accumulated amount variation curve can be cumulative impact,and by quasi combined to give the formula of the settlement amount,the project has a certain practical significance.